Super Bowl second half

Playes look around the stadium after the lights went out during the second half of NFL Super Bowl XLVII football game Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Matt Slocum)

Olympic swimmer Michael Phelps looks around during a power outage at the Superdome in the second half of the NFL Super Bowl XLVII football game between the San Francisco 49ers and the Baltimore Ravens Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Gerald Herbert)

San Francisco 49ers wide receiver Michael Crabtree (15) reacts after scoring a 31-yard touchdown during the second half of the NFL Super Bowl XLVII football game against the Baltimore Ravens, Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Matt Slocum)

Baltimore Ravens quarterback Joe Flacco (5), wide receiver Jacoby Jones (12) and linebacker Adrian Hamilton (54) watch the field during a power outage at the Superdome in the second half of the NFL Super Bowl XLVII football game against the San Francisco 49ers, Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Elaine Thompson)

The San Francisco 49ers sit on the bench during a power outage in the second half of the NFL Super Bowl XLVII football game against the Baltimore Ravens, Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Matt Slocum)

Players huddle on the field during a Superdome power outage in the second half of the NFL Super Bowl XLVII football game between the San Francisco 49ers and the Baltimore Ravens, Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Mark Humphrey)

A power failure advisory appears on a screen at the Superdome during the second half of the NFL Super Bowl XLVII football game between the San Francisco 49ers and the Baltimore Ravens, Sunday, Feb. 3, 2013, in New Orleans. The power failure delayed the game by more than 30 minutes. (AP Photo/Marcio Sanchez)

San Francisco 49ers quarterback Colin Kaepernick (7) talks with wide receiver Michael Crabtree (15) after they connected for a 31-yard touchdown during the second half of the NFL Super Bowl XLVII football game against the Baltimore Ravens, Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Gerald Herbert)

Baltimore Ravens wide receiver Jacoby Jones (12) runs the second-half opening kickoff back for a touchdown against the San Francisco 49ers in the NFL Super Bowl XLVII football game, Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Patrick Semansky)

Baltimore Ravens linebacker Ray Lewis (52) gets set on the line of scrimmage during the second half of the NFL Super Bowl XLVII football game against the San Francisco 49ers Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Matt Slocum)

Baltimore Ravens quarterback Joe Flacco (5) sits on the field after being sacked by San Francisco 49ers' Ahmad Brooks during the second half of the NFL Super Bowl XLVII football game, Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Julio Cortez)

San Francisco 49ers quarterback Colin Kaepernick (7) scores a touchdown against the Baltimore Ravens during the second half of the NFL Super Bowl XLVII football game Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Matt Slocum)

San Francisco 49ers wide receiver Ted Ginn Jr., (19) is pushed out of bounds by Baltimore Ravens punter Sam Koch (4) on his way to a first down in the third quarter of the NFL Super Bowl XLVII football game Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Dave Martin)

San Francisco 49ers quarterback Colin Kaepernick (7) walks on the sidelines during a Superdome power outage in the second half of the NFL Super Bowl XLVII football game between the 49ers and the Baltimore Ravens Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Matt Slocum)

San Francisco 49ers tight end Vernon Davis (85) runs with the ball after making a reception during the second half of the NFL Super Bowl XLVII football game against the Baltimore Ravens Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/David Goldman)

San Francisco 49ers cornerback Tarell Brown (25) recovers a fumble by Baltimore Ravens running back Ray Rice (27) during the second half of the NFL Super Bowl XLVII football game, Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Evan Vucci)

Baltimore Ravens wide receiver Anquan Boldin (81) tries to break a tackle by San Francisco 49ers defensive back Chris Culliver (29) after making a reception during the second half of the NFL Super Bowl XLVII football game, Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Mark Humphrey)

San Francisco 49ers head coach Jim Harbaugh reacts to a call during the second half of the NFL Super Bowl XLVII football game against the Baltimore Ravens, Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Mark Humphrey)

San Francisco 49ers quarterback Colin Kaepernick (7) shakes hands with offensive lineman Joe Staley (74) during the second half of the NFL Super Bowl XLVII football game against the Baltimore Ravens, Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Evan Vucci)

Baltimore Ravens running back Bernard Pierce (30) is tended to by trainers on the sidelines after sustaining an injury in the fourth quarter of the NFL Super Bowl XLVII football game against the San Francisco 49ers, Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Patrick Semansky)

San Francisco 49ers quarterback Colin Kaepernick (7) runs for a 15-yard touchdown against the Baltimore Ravens during the second half of NFL Super Bowl XLVII football game, Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Elaine Thompson)

San Francisco 49ers running back Frank Gore (21) fends off Baltimore Ravens cornerback Corey Graham (24) as he runs with the ball during the second half of the NFL Super Bowl XLVII football game, Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Mark Humphrey)

San Francisco 49ers quarterback Colin Kaepernick (7) runs toward the end zone for a 15-yard touchdown as he is followed by Baltimore Ravens safety Ed Reed (20) during the second half of the NFL Super Bowl XLVII football game, Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Matt Slocum)

Baltimore Ravens quarterback Joe Flacco (5) runs out of the pocket as San Francisco 49ers defensive end Ray McDonald (91) defends in the first half of the NFL Super Bowl XLVII football game, Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Elise Amendola)

Baltimore Ravens wide receiver Anquan Boldin (81) works against San Francisco 49ers cornerback Carlos Rogers (22) during the second half of the NFL Super Bowl XLVII football game Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Elise Amendola)

Baltimore Ravens kicker Justin Tucker (9) kicks a 38-yard field goal during the second half of the NFL Super Bowl XLVII football game against the San Francisco 49ers Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Mark Humphrey)

San Francisco 49ers head coach Jim Harbaugh protests a non-call by the officials after a fourth down play during the second half of the NFL Super Bowl XLVII football game against the Baltimore Ravens, Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Gene Puskar)

Baltimore Ravens linebacker Ray Lewis (52) reacts after the defense stopped the San Francisco 49ers on fourth-and-goal during the second half of the NFL Super Bowl XLVII football game, Sunday, Feb. 3, 2013, in New Orleans. The Ravens won 34-31. (AP Photo/Mark Humphrey)